Sheet cutter and creaser



May 2, 1933. c. a COTTRELL, 3D

SHEET CUTTER AND CREASER Filed May 21. 1951 2 Sheets-Sheet l ATTORN EYS v May 2, 1933- c. B. COTTRELL, 3D

SHEET CUTTER AND CREAS'ER Filed May 21. 1931 2 Sheets-Sheet 2 INVENTOR ATTORNEYS Patented May 2, 1 933 CALVERT B. GOTTRELIJ, 31), F WESTERLY;.RHODE ISLAND, ASSIGNYOR TO C. B. CGTTREIi-L &' SONSCGMPANY, 0F WESTERLY, RHOIDE ISLANE, A CORPORATION OF DELAWARE sneer cn'rrna AND oninasnn Application filed my 21,

The object of my invention is to provide certain improvementsin a bed and cylinder machine for cutting and creasing sheets to form folding box blanks, whereby the sheets may becut and creased without unduly bending them, thereby permitting the use of heavy as well as light stock in the machine impression cylinder, which carrier passes partway around the cylinder and is provided with grippers which take the sheet at the under side of the cylinder and carry the sheet between the bed and cylinder on the forward movement thereof to the delivery point and there release the sheet.

My invention also comprises means for causing the cut and creased sheet to travel a short distance upwardly with the cylinder before leaving it, for ensuring a clean separation of the sheet from its-cutting and creasing form on the reciprocating bed.

A practical embodiment of my invention is represented in the accompanying drawings in which: i V

Fig. 1 represents a detail vertical longitudinal section through my improved cutter and creaser, the parts being in the positions they assume just after the form bed has started on its forward stroke and the grippers on the reciprocating endless carrier have closed on the leading end of the sheet tobe cut and creased;

F 2 represents a top plan View of the same; i

Fig. 3 represents a detail vertical longi tudinal section through the cutter and creaser', the parts being in the positions they assume just as the bed and endless carrier reach the limits of their forward strokes and the grippers on the endless carrier have been 1931. Serial nateaeaa.

openedto deliver the cut and creased sheet;

and

Fig.

same;

4: represents a top plan view of the The reciprocating bed 1 bears the sheet cutting and creasing form 2. This formpurpose comprisesthe following elements:

Side chains 8 and 9 of an endless carrier pass around sprocket wheels 10 and 11 on the ends of the impression cylinder 3 and also around the sprocket wheels 12 and 13 on the shaft 14: of a rotary support for the carrier located at a distance to the rear of the impression cylinder 3. V

A set of head grippers 15 are carried by a crossbar 16 connecting the sprocket chains 8 and 9, the impression cylinder 3 having a recess 17 in its peripheral surface for re- "ceiving the grippers as the bedfcylinder and endless car 'ier reciprocate.

A fixed cam 18 is located inlposition .to coact with the stud or roller 19 on the gripper arm 20 to first open the grippers 15 as the bed and cylinder start on their forward strokes and then permit the grippers to close onto the leading end of a sheet fed from the feeder 6, to permit the sheet to be carried by the grippers between the bed and cylinder as the bed and cylinder proceed on the forward stroke. This will cause the cutting and creasing form 2 on the bed 1 to cut and crease the sheet. A fixed cam'21 is located in position to coact with the stud or roller 19 on the gripper armQO when the grippers reach a position where the tail end of the cut and creased sheet has been freed 'to open the grippers to deliver the cut and creased sheet onto the delivery table 7.

To ensure the stripping of the sheet from the form the chains 8 and 9 are caused to pass upwardly from the under side of the cylinder and around sprocket wheels 22, 23 on a cross shaft 24:.

From the above description it will be seen that I have provided means whereby the control of the sheet is maintained through its cutting and creasing operation and up to the point where the sheet is to be delivered. It will also be seen that by feeding the sheet to the under side of the impression cylinder and providing the horizontally arranged endless carrier for the sheet any undue bending of the sheet is obviated. It will also be seen that the provision of a separate delivery mechanism for the cut and creased sheet is obviated.

, It is evident that various changes may be resorted to in the construction, form and arrangement of the several parts without departing from the spirit and scope of my invention, and hence I do not intend to be limited to the particular embodiment, herein shown and described, but

What I claim is:

-- 1. In a sheet cutter and creaser, an oscillating impression cylinder, a reciprocating form bed arranged to coact therewith to cut and crease the sheet on the forward stroke of the bed, and areciprocating endless carrier operable to take a sheet at the under side of the cylinder, carry the sheet between the bed and cylinder and deliver the cut and creased sheet to a predetermined point.

2. In a sheet cutter and creaser, an oscillating impression cvlinder, a reciprocating form bed arranged to coact therewith to out and crease the sheet on the forward stroke of the bed, and a reciprocating endless carrier driven by the cylinder and operable to take a sheet at the under side of the cylinder, carry the sheet between the bed and cylinder and deliver the cut and creased sheet to a predetermined point. 4

3. In a sheet outteroand creaser, an oscillating impression cylinder, a reciprocating form bed arranged to coact therewith to cut and crease the sheet on the forward stroke of the bed, and a reciprocating endless carrier passing partway around the cylinder and having grippers operable to take a sheet'at the under side of the cylinder, carry the sheet between the bed and cylinder and deliver the cut and creased sheet to a predetermined point,

4. In a sheet cutter and creaser, an oscillating impression cylinder, a reciprocating form bed arranged to coact therewith to cut and crease the sheet on the forward stroke of side of the cylinder, carry the sheet between the bed and cylinder and deliver the cut and creased sheet to a predetermined point, and means for causing the sheet to travel a short distance upwardly withthe cylinder before leavingit for ensuring the'stripping of the sheet from its cutting and creasing form.

5. In a sheet cutter and creaser, an oscillating impression cylinder, a reciprocating form bed arranged to coact therewith to cut and crease the sheet on the forward stroke ofthe bed, a reciprocating endless carrier passing partway around the cylinder and having grippers operable to take a sheet at the under side of the cylinder,carry the sheet between the bed and cylinder and deliver the out and creased sheet to a predetermined point, and rotary means over which the endless carrier passes for causing the sheet to travel a short distance upwardly with the cylinder before leaving it for ensuring the stripping of the sheet from its cutting and creasing form.

6. In a sheet cutter and creaser, an oscillating impression cylinder, a reciprocating form bed arranged to coact therewith to cut and crease the sheet on the forward stroke of the bed, a rotary support located a distance rearwardly from the impression cylinder, and a reciprocating endless carrier passing partway around the said cylinder and rotary support, said carrier having head grippers operable to take the leading end of a sheet at the under side of the cylinder, carry the sheet between the bed and cylinder and release the head end of the sheet afteritstail end has left the -cylinder,'to deliver the sheet.

7 In a sheet cutter and creaser, an oscillating impression cylinder, a reciprocating form bed arranged to coact therewith to cut and crease the sheet on the forward stroke of the bed, a rotary support located a distance rearwardly from the impression cylinder, a reciprocating endless carrier passing partway around the said cylinder and rotary support, sald carrier having head grippers operable to take theleading end of a sheet at the under side of the cylinder, carry the sheet between the bed and cylinder and release the head end of the sheet after its tail end has left the cylinder, to deliver the sheet, and a rotary carrier adjacent the cylinder and over which the endless carrier passes for causing the sheet to travel a short distance upwardly with the cylinder before leaving it for ensuring the stripping of the sheet from the cutting and creasing form. r i

In testimony, that I claim the foregoing as my invention, I have. signed my name this 8th day of May A. 1)., 1931.

CALVERT B. COTTRELL, 3D.

the bed, a reciprocating endless carrier passv ing partway around the cylinder and having grippers operable to take a sheet at the under 

